On this holiday episode of Head 2 Head, Jonny Lieberman and Jethro Bovingdon wring out two honest to goodness super sedans, the BMW M5 Competition and the Mercedes-AMG GT 63 S. These two big Germans sport over 1,200 horsepower between them and are tuned with racetracks and lap times in mind. To find out which four-door is best, Jethro and Jonny travel to Upstate New York in hopes of catching the last bit of fall foliage while tearing up some fabulous country roads. From there the boys head to Connecticut and one of the best tracks in the country, if not the world, Lime Rock. Once there, they examine the nuances of AWD versus RWD. And by nuances we mean big power slides and tons of tire smoke. Which sedan proves to be the most super? Watch and find out!